JP2006125731A - Vehicular heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular heat exchanger capable of improving durability of tubes by preventing thermal stress caused by a temperature difference of the tubes. <P>SOLUTION: In the vehicular heat exchanger, tubes 3 and fins are plurally arranged one after the other between tanks 2a and 2b arranged facing each other with a predetermined interval in between, and while sucked in air in one tank 2a is communicated through each tube 3 and moved into the other tank 2b, it is cooled by a vehicle traveling wind via the fins 4. Of the plurality of tubes 3, one part of a tube 3a exposed more in comparison with other tubes is covered by a windbreaking plate 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle heat exchanger.

Conventionally, as a heat exchanger for a vehicle, there are mainly various types such as a condenser, a radiator, an integrated heat exchanger, an oil cooler, an intercooler, and the like. In addition, a plurality of tubes and fins are alternately arranged. While the refrigerant in one tank is circulated in the other tank via each tube, the vehicle running wind or the forced wind and heat generated by the fan are passed through the fins. By exchanging the refrigerant, the refrigerant is cooled (see Patent Document 1).
Japanese Patent Laid-Open No. 11-14285

However, in the conventional vehicle heat exchanger, the wind from the vehicle or the forced air from the fan does not uniformly hit all the tubes due to the arrangement of the front grill, frame, fan, etc. of the vehicle. However, there is a problem that the tube that hits more often becomes lower in temperature than other tubes and may be cracked or broken by thermal stress due to a temperature difference from the other tubes.
Note that the outermost tube in the core portion also tends to be lower in temperature than other tubes.

  The present invention has been made in order to solve the above-mentioned problems, and the object of the present invention is to prevent the occurrence of thermal stress due to the temperature difference between the tubes and improve the durability of the tubes. Is to provide a vessel.

  In the invention according to claim 1 of the present invention, a plurality of tubes and fins are alternately arranged between the tanks facing each other at a predetermined interval, and the refrigerant in the one tank flows through each tube. In the vehicle heat exchanger that is cooled by the vehicle running wind or the forced wind by the fan through the fins while moving into the other tank, the temperature of the plurality of tubes is lower than that of the other tubes. A part of the tube is covered with a windproof plate.

  In the first aspect of the present invention, a plurality of tubes and fins are alternately arranged between the tanks opposed to each other at a predetermined interval, and the refrigerant in the one tank flows through each tube. In the vehicle heat exchanger that is cooled by the vehicle running wind or the forced wind by the fan through the fins while moving into the other tank, the temperature of the plurality of tubes is lower than that of the other tubes. Since a part of the tube is covered with the windproof plate, the wind volume received by the tube whose temperature is lowered can be adjusted with the windproof plate to prevent the thermal stress caused by the temperature difference between the tubes, and the durability of the tube can be improved.

  Embodiments of the present invention will be described below with reference to the drawings.

Example 1 will be described below.
In the first embodiment, a case where the vehicle heat exchanger is applied to an air-cooled intercooler will be described.
1 is a front view showing a vehicle heat exchanger according to a first embodiment of the present invention, FIG. 2 is a top view thereof, FIG. 3 is a rear view thereof, and FIG. 4 is a front view showing a core portion of the first embodiment. 5 is a plan view of the windbreak plate of the first embodiment, and FIG. 6 is a top view thereof.

First, the overall configuration will be described.
As shown in FIGS. 1 to 3, the vehicle heat exchanger according to the present embodiment travels in the vehicle with compressed intake air (corresponding to a refrigerant) in order to sufficiently obtain the effect of supercharging in an engine with a supercharger. An air-cooled intercooler for cooling with wind, a pair of seat plates 2a, 2b with tanks 1a, 1b mounted thereon, and a plurality of tubes 3 and fins disposed between the seat plates 2a, 2b 4 and the reinforcements 5a and 5b for connecting and reinforcing both end portions of the seat plates 2a and 2b are the main components.

  The tanks 1a and 1b include input / output ports P1 and P2 projecting toward the rear of the vehicle, and are fixed to the seat plates 2a and 2b by welding (not shown) so as to seal the inside.

  Further, as shown in FIG. 4, both ends of the tube 3 are fitted and fixed to the seat plates 2a and 2b, and the tube 3, the fin 4, and the reinforcements 5a and 5b including the seat plates 2a and 2b. These are all made of aluminum, and after being assembled together in advance, the core portion 6 is formed by brazing together in a heat treatment furnace (not shown).

A windbreak plate 7 shown in FIGS. 5 and 6 is provided on the front side of the core portion 6.
Specifically, the windbreak plate 7 is made of aluminum and is formed in a substantially equilateral triangle shape, and its apex portion 7a is arranged at the approximate center of the plurality of tubes 3a (see FIG. 4) arranged at the approximate center of the core portion 6. The bottom side 7b is fixed to the tank 2a by welding X (see FIG. 1) so as to cover at least the base of the tube 3a with the seat plate 2a.
In the vehicle heat exchanger according to the first embodiment, an opening portion of a front grill (not shown) is disposed at a position in front of the tube 3a.

Next, the operation will be described.
In the vehicle heat exchanger configured as described above, intake air of about 160 ° C. compressed by a supercharger (not shown) flows into the tank 2a from the input / output port P1 and flows through each tube 3. While flowing into the tank 2b, the heat is exchanged with the vehicle traveling wind through the fins 4 and cooled to about 40 ° C., then discharged from the input / output port P2 and flows into the engine.

Further, in the vehicle heat exchanger of the first embodiment, since the vehicle traveling wind directly hits the tube 3a from the opening of the front grill, the tube 3a receives more vehicle traveling wind than the other tubes 3. The surface temperature gradually decreases, and as a result, there is a possibility that cracks and breakage may occur at the base of the tube 3a due to thermal stress caused by the temperature difference between the two.
The surface temperature of the tube 3a is about 40 ° C. lower than that of the hottest tube 3.

However, in the vehicle heat exchanger of the first embodiment, the vehicle traveling wind hitting the tube 3a by the windbreak plate 7 can be reduced to the same level as the other tubes 3, and thereby the temperature difference from the other tubes 3 can be reduced. It can be lost.
Therefore, it is possible to prevent thermal stress caused by the temperature difference of the tube 3 and prevent the base of the tube 3a from being cracked or damaged, and to improve the durability of the tube 3 and thus the durability of the vehicle heat exchanger.

Next, the effect will be described.
As described above, in the vehicle heat exchanger according to the first embodiment, a plurality of tubes 3 and fins are alternately arranged between the tanks 2a and 2b arranged to face each other at a predetermined interval. In the vehicle heat exchanger that is cooled by the vehicle running wind through the fins 4 while the intake air in the 2a flows through the tubes 3 and moves into the other tank 2b, the plurality of tubes 3 Among them, since the windproof plate 7 covers a part of the tube 3a whose temperature is lower than that of other tubes, the airflow received by the tube 3a can be adjusted by the windproof plate 7 to prevent overcooling of the tube 3a. The thermal stress resulting from the temperature difference can be prevented.

Further, in the first embodiment, since the windbreak plate 7 is formed in a regular triangle shape with the tank 2a side as the base portion 7b, the range in which the tube 3a is covered can be gradually reduced from the center toward the outside. The temperature of the tube 3a can be gradually increased from the center to the outside to eliminate the temperature difference from the other tubes 3.
In the first embodiment, the windbreak plate 7 is provided on the tank 2a side of the tube 3a, but the same effect can be obtained even if it is provided on the tank 2b side. Moreover, you may attach the wind-proof board 7 to both the tank 2a side and the tank 2b side.

  Further, in this embodiment, the windbreak plate 7 is formed in an equilateral triangle shape with the tank 2a side (tank 2b side) as the bottom side portion 7b. However, the windbreak plate 7 is a rectangular windbreak covering the entire tube 3a, which has a lower temperature than other tubes. It is good also as a board.

Example 2 will be described below.
The vehicle heat exchanger according to the second embodiment is the same as the first embodiment except that the shape and the mounting position of the windbreak plate described in the first embodiment are changed. The description will be omitted with reference numerals, and only the differences will be described in detail.
7 is a front view showing a vehicle heat exchanger according to a second embodiment of the present invention, FIG. 8 is a plan view of a windbreak plate, FIG. 9 is a top view thereof, and FIG. 10 is a front view of a core portion of the second embodiment. is there.

As shown in FIG. 7, in the vehicle heat exchanger of the second embodiment, a windbreak plate 20 shown in FIGS. 8 and 9 is provided on the front side of the core portion 6.
Specifically, the windproof plate 20 is made of aluminum and is formed in a substantially right triangle shape, and its apex portion 20a is disposed on the outermost tube 3b (see FIG. 10) adjacent to the reinforcement 5b, and its bottom portion. 20b is fixed to the tank 2a by welding X1 so as to cover the root of the tube 3b with the seat plate 2a.

  In the vehicle heat exchanger configured as described above, the fins 4a (see FIG. 10) adjacent to the reinforcement 5b are not in a state in which the tubes 3 are disposed on both sides of the fins 4a. In addition, since the heat is radiated by the reinforcement 5b, the temperature of the outermost tube 3b is lower than that of the other tubes 3, and as a result, there is a possibility that the root of the tube 3b is cracked or damaged.

  However, in the dual heat exchanger of the second embodiment, the vehicle wind that hits the tube 3b with the windbreak plate 20 can be reduced to eliminate the temperature difference between the tube 3b and the other tube 3, and thereby the tube 3b It is possible to improve the durability of the tube 3 and thus the durability of the vehicle heat exchanger by preventing the base from being cracked or broken.

Further, in the first embodiment, since the windbreak plate 20 is formed in a substantially right triangle shape with the tank 2a side as the bottom portion 20b, the range covered by the windbreak plate 20 can be reduced inward from the tube 3b, It is possible to eliminate the temperature difference from the other tubes 3 by gradually increasing the temperature from the tube 3b to the inside.
In the second embodiment, the windproof plate 20 is provided on the tank 2a side of the tube 3b, but the same effect can be obtained even if it is provided on the tank 2b side. Moreover, you may attach the wind-proof board 20 to both the tank 2a side and the tank 2b side.

Further, the windbreak plate 20 may be a rectangular windbreak plate that covers the entire tube 3a whose temperature is lower than that of other tubes.
Further, a windproof plate 20 may be provided so as to cover the root of the outermost tube 3c (see FIG. 10) adjacent to the reinforcement 5a with the tank 2a (2b), but the tube 3c is connected to the input / output port P1. Since they are close to each other, the temperature is not particularly lowered, and the adverse effect of thermal stress is less than that of the tube 3b.

Although the embodiment of the present invention has been described above, the specific configuration of the present invention is not limited to the present embodiment, and the present invention can be applied even if there is a design change or the like without departing from the gist of the invention. include.
For example, in the present embodiment, the case where the vehicle heat exchanger is applied to an air-cooled intercooler has been described. However, the present invention is applied to a general vehicle heat exchanger such as a condenser, a radiator, an integrated heat exchanger, and an oil cooler. It is possible to provide a windbreak plate on at least a part of the tube where the vehicle traveling wind hits particularly well or the temperature decreases for other reasons.
Further, the shape, the number of installation, the fixing method, and the like of the windbreak plates 7 and 20 can be set as appropriate.

It is a front view which shows the heat exchanger for vehicles of Example 1 of this invention. It is a top view which shows the heat exchanger for vehicles of the present Example 1. It is a rear view which shows the heat exchanger for vehicles of the present Example 1. It is a front view of the core part of the present Example 1. FIG. It is a top view of the windbreak board of the present Example 1. FIG. It is a top view of the windbreak board of the present Example 1. FIG. It is a front view which shows the heat exchanger for vehicles of Example 2 of this invention. It is a top view of the present Example 2 windbreak board. It is a top view of the windbreak board of the present Example 2. FIG. It is a front view of the core part of the present Example 2.

Explanation of symbols

P1, P2 Input / output port X, X1 Welding 1a, 1b Tank 2a, 2b Seat plate 3, 3a, 3b Tube 4 Fin 5a, 5b Reinforce 6 Core part 7, 20 Windproof plate 7a, 20a Vertex part 7b, 20b Bottom part

Claims (1)

A plurality of tubes and fins are alternately arranged between the tanks arranged opposite each other at a predetermined interval,
In the vehicle heat exchanger, the refrigerant in the one tank is cooled by the vehicle running wind or the forced wind by the fan through the fins while the refrigerant flows through each tube and moves into the other tank.
A core part structure of a heat exchanger, wherein at least a part of the plurality of tubes having a temperature lower than that of the other tubes is covered with a windbreak plate.

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